Chuck



FIG. 1 is a perspective view of a chuck embodying the design of the present invention;

FIG. 2 is a bottom or rear view of the chuck illustrated in FIG. 1;

FIG. 3 is a side view of the chuck of FIG. 1; and,

FIG. 4 is a top or front view of the chuck illustrated in FIG. 1. 

The ornamental design of a chuck, as shown and described. 